## Psychometric Methods |

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### Contents

Chapter | 1 |

The Method of Average Error Method of Reproduction | 23 |

Properties of the Normal Distribution Curve | 71 |

Copyright | |

15 other sections not shown

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### Common terms and phrases

ability applied arithmetic mean assume average axes beta coefficients cent centroid chapter class interval coefficient of correlation column compared computed constant errors correction corresponding criterion determined differences Educ equal equation estimate example experiment experimental factor analysis factor loadings Fechner's formula frequencies function geometric mean give given graphic greater illustrative problem increase individual intercorrelations interpolation judges judgments large number limen limits linear mathematical mean measurements median mental tests negative normal curve normal distribution observed obtained ogive paired comparisons plot positive predictions probable error procedure proportions Psychol psychology psychophysical psychophysical methods range rank ratings ratio regression relationship relative reliability rotation samples scale values sigma significant Spearman's standard deviation standard error statistical stimuli student Table test items test scores theoretical theory Thurstone Thurstone's tion total number traits true unit Urban's validity variables Weber's law weight